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| Mystery in Space #66 | ||
| DC Comics, 3/61 | ||
| Gardner Fox story, Infantino cover | Star Rovers backup story. | |
| Carmine Infantino, Murphy Anderson, | Full page ad for Brave and the Bold #34 | |
| Mike Sekowsky and Sid Greene art | ||
| Books | CGC Label | CGC Total | Avg. Grade | 10 | 9.9 | 9.8 | 9.6 | 9.4 | 9.2 | 9.0 | 8.5 | 8.0 | 7.5 | 7.0 | 6.5 | 6.0 | 5.5 | 5.0 | 4.5 | 4.0 | 3.5 | 3.0 | 2.5 | 2.0 | 1.8 | 1.5 | 1.0 | 0.5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 BOOK | Universal | 40 | 6.56 | 0 0.00% | 0 0.00% | 0 0.0% | 1 2.5% | 2 7.5% | 1 10.0% | 2 15.0% | 5 27.5% | 2 32.5% | 1 35.0% | 6 50% | 2 55% | 4 65% | 4 75% | 4 85% | 0 85% | 2 90% | 2 95% | 1 98% | 0 98% | 0 98% | 1 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Restored | 1 | 7.50 | 0 0.00% | 0 0.00% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Qualified | 1 | 8.00 | 0 0.00% | 0 0.00% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| Mystery in Space #66 (1961, DC Comics) CGC Universal Grade Distribution | ||||||||||||||||||||||||
| 0% 0 10 | 0% 0 9.9 | 0% 0 9.8 | 3% 1 9.6 | 5% 2 9.4 | 3% 1 9.2 | 5% 2 9.0 | 13% 5 8.5 | 5% 2 8.0 | 3% 1 7.5 | 15% 6 7.0 | 5% 2 6.5 | 10% 4 6.0 | 10% 4 5.5 | 10% 4 5.0 | 0% 0 4.5 | 5% 2 4.0 | 5% 2 3.5 | 3% 1 3.0 | 0% 0 2.5 | 0% 0 2.0 | 3% 1 1.8 | 0% 0 1.5 | 0% 0 1.0 | 0% 0 0.5 |
| cgcdata.com, last updated September 16, 2025 | ||||||||||||||||||||||||